Hypothesis (a): The prevalence and incidence of cardiac diseases including coronary artery disease and cardiomyopathy will be higher in the SCI population than age-matched samples of the able-bodied population while valvular disease and arrhythmia will be similar. (b): The prevalence and incidence of cardiac disease in SCI individuals will be associated with level and completeness of injury (ie, higher occurrence in those with higher lesion levels and more complete injuries.) (c) The ECG will be helpful in SCI patients in early identification and secondary prevention of both ischemic and cardiomyopathic heart disease. (d) Continuous Holter ECG recordings or echocardiograms will only be indicated for screening specific SCI patients identified by clinical and electrocardiographic features.